A driven member of a metal peening machine is disclosed. The metal peening machine is configured to drive the driven member into contact with a work surface of a metal workpiece to deform the metal workpiece. The driven member includes a shaft with an impact end. The driven member includes least one of a plurality of impact features, an impact feature with a non-flat impact surface, a non-round impact feature, and an asymmetrical impact feature that is coupled to and protrudes from the impact end of the shaft. The at least one of the plurality of impact features, the impact feature with a non-flat impact surface, the non-round impact feature, and the asymmetrical impact feature define at least one impact surface to be driven into contact with the work surface of the metal workpiece.

A driven member of a metal peening machine is disclosed. The metal peening machine is configured to drive the driven member into contact with a work surface of a metal workpiece to deform the metal workpiece. The driven member includes a shaft with an impact end. The driven member includes least one of a plurality of impact features, an impact feature with a non-flat impact surface, a non-round impact feature, and an asymmetrical impact feature that is coupled to and protrudes from the impact end of the shaft. The at least one of the plurality of impact features, the impact feature with a non-flat impact surface, the non-round impact feature, and the asymmetrical impact feature define at least one impact surface to be driven into contact with the work surface of the metal workpiece.

A method of manufacturing a panel using an initial die and a series of secondary dies includes sequentially defining multi-dimensional models for the series of secondary dies. The method includes simulating a geometry of an n.sup.th pre-panel, defining a multi-dimensional model of the n.sup.th secondary die based on the simulated geometry of the n.sup.th pre-panel, simulating operation of the n.sup.th secondary die on the n.sup.th pre-panel to determine geometry of an (n+1).sup.th pre-panel, and determining a deviation between the simulated (n+1).sup.th pre-panel and a target pre-panel geometry. If the deviation is outside tolerance, the method includes iteratively: adjusting the multi-dimensional model of the n.sup.th secondary die, simulating operation thereof to determine an adjusted simulated geometry of the (n+1).sup.th pre-panel, and determining a deviation between the adjusted simulated geometry of the (n+1).sup.th pre-panel and the target (n+1).sup.th pre-panel, until the deviation is within the tolerance limit.

A method of manufacturing a panel using an initial die and a series of secondary dies includes sequentially defining multi-dimensional models for the series of secondary dies. The method includes simulating a geometry of an n.sup.th pre-panel, defining a multi-dimensional model of the n.sup.th secondary die based on the simulated geometry of the n.sup.th pre-panel, simulating operation of the n.sup.th secondary die on the n.sup.th pre-panel to determine geometry of an (n+1).sup.th pre-panel, and determining a deviation between the simulated (n+1).sup.th pre-panel and a target pre-panel geometry. If the deviation is outside tolerance, the method includes iteratively: adjusting the multi-dimensional model of the n.sup.th secondary die, simulating operation thereof to determine an adjusted simulated geometry of the (n+1).sup.th pre-panel, and determining a deviation between the adjusted simulated geometry of the (n+1).sup.th pre-panel and the target (n+1).sup.th pre-panel, until the deviation is within the tolerance limit.

A process for stamping metallic member with forging thickness of side walls, the process comprising: a forming step by forging, which forms the metallic member by forging; a step for forging thickness of the side walls, which extrudes the side walls of the metallic member to increase thickness of the metallic member; a specular treatment step with diamond cutter, which generates metallic texture of the side walls of the metallic member; and a finish step for forging thickness of the side walls of the metallic member. Wherein the metallic member, for example, is a sheet stamping component.

A process for stamping metallic member with forging thickness of side walls, the process comprising: a forming step by forging, which forms the metallic member by forging; a step for forging thickness of the side walls, which extrudes the side walls of the metallic member to increase thickness of the metallic member; a specular treatment step with diamond cutter, which generates metallic texture of the side walls of the metallic member; and a finish step for forging thickness of the side walls of the metallic member. Wherein the metallic member, for example, is a sheet stamping component.

A double-sided roll bond condenser has a main body, an interposition section, and a neck portion. The main body is an upright board and has two side surfaces. Two filling structures are respectively protruded from the two side surfaces of the main body. The interposition section is formed at a bottom portion of the double-side roll bond condenser, and is a U-shaped folded structure. The U-shaped folded structure protrudes from one of the two side surfaces of the main body. The neck portion is located between the main body and the interposition section.

A double-sided roll bond condenser has a main body, an interposition section, and a neck portion. The main body is an upright board and has two side surfaces. Two filling structures are respectively protruded from the two side surfaces of the main body. The interposition section is formed at a bottom portion of the double-side roll bond condenser, and is a U-shaped folded structure. The U-shaped folded structure protrudes from one of the two side surfaces of the main body. The neck portion is located between the main body and the interposition section.

A springback variation cause analysis method includes: calculating a first stress distribution in a press forming part; calculating a second stress distribution in the press forming part; calculating a difference between the second and the first stress distribution, and replacing and setting the first or the second stress distribution with the calculated stress difference distribution; calculating a first springback amount to be caused in the press forming part; changing a value of stress difference in a partial area of the press forming part in the stress difference distribution set for the press forming part; calculating a second springback amount; and analyzing a portion in the press forming part that is a cause of variation in springback amount in the press forming part due to scattering or variation in press forming conditions, based on the second springback amount and the first springback amount.

A springback variation cause analysis method includes: calculating a first stress distribution in a press forming part; calculating a second stress distribution in the press forming part; calculating a difference between the second and the first stress distribution, and replacing and setting the first or the second stress distribution with the calculated stress difference distribution; calculating a first springback amount to be caused in the press forming part; changing a value of stress difference in a partial area of the press forming part in the stress difference distribution set for the press forming part; calculating a second springback amount; and analyzing a portion in the press forming part that is a cause of variation in springback amount in the press forming part due to scattering or variation in press forming conditions, based on the second springback amount and the first springback amount.